<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box {
          width: 200px;
          height: 200px;
          border: 3px solid #000;
          font-size: 30px;
          margin-top: 10px;
        }
        .pink {
          background-color: pink;
        }
        .big {
          width: 300px;
          height: 300px;
        }
      </style>
</head>

<body>
    <script src="./vue.js"></script>
    <div id="app">
        <!--绑定对象-->
        <div class="box" :class="[`pink`,`big`]">黑马程序员</div>
        <!--绑定数组-->
        <div class="box" :class="{pink:true,big:true}">黑马程序员</div>
      </div>
  
      <script>
        const app = new Vue({
          el: '#app',
          data: {
      
          }
        })
      </script>
</body>

</html>